1
JEE Main 2020 (Online) 8th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
An unsaturated hydrocarbon X absorbs two hydrogen molecules on catalytic hydrogenation and also gives following reaction : JEE Main 2020 (Online) 8th January Evening Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 180 English B(3 - oxo - hexanedicarboxylic acid) X will be :-
A
JEE Main 2020 (Online) 8th January Evening Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 180 English Option 1
B
JEE Main 2020 (Online) 8th January Evening Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 180 English Option 2
C
JEE Main 2020 (Online) 8th January Evening Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 180 English Option 3
D
JEE Main 2020 (Online) 8th January Evening Slot Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 180 English Option 4
2
JEE Main 2020 (Online) 8th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
For the following Assertion and Reason, the correct option is :

Assertion : The pH of water increases with increase in temperature.

Reason : The dissociation of water into H+ and OH is an exothermic reaction.
A
Both assertion and reason are false.
B
Both assertion and reason are true, but the reason is not the correct explanation for the assertion.
C
Both assertion and reason are true, and the reason is the correct explanation for the assertion.
D
Assertion is not true, but reason is true.
3
JEE Main 2020 (Online) 8th January Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The radius of the second Bohr orbit, in terms of the Bohr radius, a0, in Li2+ is :
A
$${{2{a_0}} \over 9}$$
B
$${{2{a_0}} \over 3}$$
C
$${{4{a_0}} \over 9}$$
D
$${{4{a_0}} \over 3}$$
4
JEE Main 2020 (Online) 8th January Evening Slot
Numerical
+4
-0
Change Language
Complexes (ML5) of metals Ni and Fe have ideal square pyramidal and trigonal bipyramidal grometries, respectively. The sum of the 90°, 120° and 180° L-M-L angles in the two complexes is ________.
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